# SDR HEEA078039

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 25, 2002
- Submitted: March 18, 2002
- Operation: General aviation
- Aircraft: N721PH
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53278
- Aircraft time: 3,135 hours
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Transmission
- Part number: 407040006107
- Part serial: A294
- Condition: Corroded
- Location: M/R Gearbox
- Part time: 2,677 hours
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HEEA078039

## Discrepancy

MAIN ROTOR GEARBOX TRANSMISSION HAS CORROSION ON SPLIT LINE.

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